I was wondering how that would have gone over with my old high school English teacher.
I was wondering how that would have gone over with my old high school English teacher.
If he knew his stuff, he'd have no problem. "more" modifies the word omitted (mutations)--"more small mutations ... more large mutations." One group has more mutations which are small; the other group has more mutations which are large.
This should not be confused with the comparatives of small or large (smaller, larger). Such a substitution results in a different statement.
"One group has smaller mutations; the other group has larger mutations"
...which says nothing about the relative number of such mutations. Clear?